[PATCH v3 03/12] arm64: smp: Tidy up smp_prepare_cpus()

[Jinjie Ruan]

From: Will Deacon <will at kernel.org>

smp_prepare_cpus() is always run on the boot CPU (i.e. CPU 0) but goes
to great lengths to support running on a CPU where smp_processor_id()
is non-zero.

Clean up the code a little by hardcoding zero for the boot CPU ID.

Signed-off-by: Will Deacon <will at kernel.org>
Signed-off-by: Jinjie Ruan <ruanjinjie at huawei.com>
---
 arch/arm64/kernel/smp.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index 1aa324104afb..e858d7d64d1f 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -772,16 +772,14 @@ void __init smp_init_cpus(void)
 void __init smp_prepare_cpus(unsigned int max_cpus)
 {
 	const struct cpu_operations *ops;
-	int err;
 	unsigned int cpu;
-	unsigned int this_cpu;
+	int err;
 
 	init_cpu_topology();
 
-	this_cpu = smp_processor_id();
-	store_cpu_topology(this_cpu);
-	numa_store_cpu_info(this_cpu);
-	numa_add_cpu(this_cpu);
+	store_cpu_topology(0);
+	numa_store_cpu_info(0);
+	numa_add_cpu(0);
 
 	/*
 	 * If UP is mandated by "nosmp" (which implies "maxcpus=0"), don't set
@@ -796,8 +794,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
 	 * secondaries from the bootloader.
 	 */
 	for_each_possible_cpu(cpu) {
-
-		if (cpu == smp_processor_id())
+		if (cpu == 0)
 			continue;
 
 		ops = get_cpu_ops(cpu);
-- 
2.34.1